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|Title:||Altered energy partitioning across terrestrial ecosystems in the European drought year 2018|
|Authors:||GRAF ALEXANDER; KLOSTERHALFEN ANNE; ARRIGA NICOLA; BERNHOFER CHRISTIAN; BOGENA HEYE; BORNET FRÉDÉRIC; BRUGGEMANN NICOLAS; BRUMMER CHRISTIAN; BUCHMANN NINA; CHI JINSHU; CHIPEAUX CHRISTOPHE; CREMONESE EDOARDO; CUNTZ MATTHIAS; DUSEK JIŘÍ; EL-MADANY TAREK S.; FARES SILVANO; FISCHER MILAN; FOLTYNOVA LENKA; GHARUN MANA; GHIASI SHIVA; GIELEN BERT; GOTTSCHALK PIA; GRUNWALD T.; HEINEMANN GÜNTHER; HEINESCH BERNARD; HELIASZ MICHAL; HOLST JUTTA; HORTNAGL LUKAS; IBROM A; INGWERSEN JOACHIM; JURASINSKI GERALD; KLATT JANINA; KNOHL ALEXANDER; KOEBSCH FRANZISKA; KONOPKA JAN; KORKIAKOSKI MIKA; KOWALSKA NATALIA; KREMER PASCAL; KRUIJT B.; LAFONT SEBASTIEN; LEONARD JOËL; DE LIGNE ANNE; LONGDOZ BERNARD; LOUSTAU D.; MAGLIULO VINCENZO; MAMMARELLA IVAN; MANCA GIOVANNI; MAUDER MATTHIAS; MIGLIAVACCA MIRCO; MOLDER MEELIS; NEIRYNCK J.; NEY PATRIZIA; NILSSON MATS B.; PAUL-LIMOGES EUGENIE; PEICHL MATTHIAS; PITACCO ANDREA; POYDA ARNE; REBMANN CORINNA; ROLAND MARILYN; SACHS TORSTEN; SCHMIDT MARIUS; SCHRADER FREDERIK; SIEBICKE LUKAS; SIGUT LADISLAV; TUITTILA EEVA-STIINA; VARLAGIN ANDREJ; VENDRAME NADIA; VINCKE CAROLINE; VÖLKSCH INGO; WEBER STEPHAN; WILLE CHRISTIAN; WIZEMANN HANS-DIETER; ZEEMAN MATTHIAS; VEREECKEN HARRY|
|Citation:||PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES vol. 375 no. 1810 p. 20190524|
|Type:||Articles in periodicals and books|
|Abstract:||Drought and heat events, such as the 2018 European drought, interact with the exchange of energy between the land surface and the atmosphere, potentially affecting albedo, sensible and latent heat fluxes, as well as CO2 exchange. Each of these quantities may aggravate or mitigate the drought, heat, their side effects on productivity, water scarcity and global warming. We used measurements of 56 eddy covariance sites across Europe to examine the response of fluxes to extreme drought prevailing most of the year 2018 and how the response differed across various ecosystem types (forests, grasslands, croplands and peatlands). Each component of the surface radiation and energy balance observed in 2018 was compared to available data per site during a reference period 2004–2017. Based on anomalies in precipitation and reference evapotranspiration, we classified 46 sites as drought affected. These received on average 9% more solar radiation and released 32% more sensible heat to the atmosphere compared to the mean of the reference period. In general, drought decreased net CO2 uptake by 17.8%, but did not significantly change net evapotranspiration. The response of these fluxes differed characteristically between ecosystems; in particular, the general increase in the evaporative index was strongest in peatlands and weakest in croplands.|
|JRC Directorate:||Energy, Transport and Climate|
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